Pareto chart: Histogram-shows defects ranked from greatest to least.
Pareto law: 80% problems come from 20% problems. Pareto chart is used to find the root causes of the problems.
Run Chart: Displays quality over time. Example: Time/month on X axis, defects per thousand on y axis.
Scatter Diagram: Plot all data and try to find the trendsStatistical Sampling: Take a sample randomly and measure quality
Defect repair review